Reference Infomation; Technical Terms - Samsung LS17PEA 732N Service Manual

14 Reference Infomation

14-1 Technical Terms

-TFT-LCD
(Thin film Transistor Liquid Crystal Display)
ADC(Analog to Digital Converter)
This is a circuit that converts from analog signal to
digital signals.
-PLL(Phase Locked Loop)
During progressing ADC, Device makes clock syn-
chronizing HSYNC with Video clock
-Inverter
Device that supplies Power to LCD panel lamp. This
device generates about 1,500~2,000V.
AC Adapter
Device that converts AC(90V~240V) to DC(+12V or
14V)
SMPS(Switching Mode Power Supply)
Switching Mode Power supply. This design technol-
ogy is used to step up/down the input power by
switching on/off
-FRC(Frame Rate Controller)
Technology that changes the number of frames dis-
played on screen per second.
TFT-LCD panel requires 60 frames per second.
This technology is needed to convert input image to
60 frames per second regardless input frame quan-
tity.
-Image Scaler
Technology that converts an input resolution to
another resolution.(ex. 640* 480 to 1024*768)
-Auto Configuration(Auto adjustment)
This is an algorithm to adjust monitor to optimum
condition by pushing one key.
-OSD(On Screen Display)
Customers can easily control the screen settings
using the OSD.
-FINE
The "Fine" adjustment is used to adjust visibility by
controlling phase difference.
-COARSE
This adjustment adjusts the display by tuning Video
clock and PLL clock.
-DVI (Digital Visual Interface)
This provides a high speed digital connection for
visual data types that is display technology inde-
pendent. This interface is primarily forcused at pro-
viding a connection between a computer and
its display device.
-L.V.D.S.(Low Voltage Differential Signaling)
A kind of transmission method for Digital.It can be
used from Main PBA to Panel.
-T.M.D.S
(Transition minimized Differential Signaling)
a kind of transmission method for Digital.
It can be used from Video card to Main PBA.
-DDC(Display data channel)
It is a communication method between Host
Computer and related equipment.
It enables Plug and Play between PC and Monitor.
-EDID
Extended Display Identification Data PC can recog-
nize monitor information such as Product data,
Product name,Display mode,Serial number and
Signal source, etc Data is recognised via DDC Line
linking PC and Monitor.
-Dot Pitch
The image on a monitor is composed of red, green
and blue dots. The closer the dots, the higher the
resolution. The distance between two dots of the
same color is called the 'Dot Pitch'. Unit: mm
-Vertical Frequency
The screen must be redrawn several times per sec-
ond in order to create and display an image for the
14 Reference Infomation
14-1